As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED A MX CLASS 2 MESSAGE OF SMOKE. FOUND ALL LAVATORY AIR EXTRACTION FILTERS CLOGGED. R 7 R ALL LAVATORY EXTRACTION FILTERS IAW AMM 21-23-00. RESET CID'S & SDF CB`S IAW AMM 24-00-00-810-818A. PERFORMED TEST OF LAVATORY SMOKE DETECTION SYS IAW AMM 26-17-00-710-001A, TEST PASSED & NO MSGS OR FAULTS.